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Enhanced Ultraviolet Stability of Air-Processed Polymer Solar Cells by Al Doping of the ZnO Interlayer

M. Prosa ; M. Tessarolo ; M. Bolognesi ; O. Margeat ; Desta Antenehe Gedefaw (Institutionen för kemi och kemiteknik, Polymerteknologi) ; M. Gaceur ; C. Videlot-Ackermann ; Mats R. Andersson (Institutionen för kemi och kemiteknik, Polymerteknologi) ; M. Muccini ; M. Seri ; J. Ackermann
ACS Applied Materials and Interfaces (1944-8244). Vol. 8 (2016), 3, p. 1635-1643.
[Artikel, refereegranskad vetenskaplig]

Photostability of organic photovoltaic devices represents a key requirement for the commercialization of this technology. In this field, ZnO is one of the most attractive materials employed as an electron transport layer, and the investigation of its photostability is of particular interest. Indeed, oxygen is known to chemisorb on ZnO and can be released upon UV illumination. Therefore, a deep analysis of the UV/oxygen effects on working devices is relevant for the industrial production where the coating processes take place in air and oxygen/ZnO contact cannot be avoided. Here we investigate the light-soaking stability of inverted organic solar cells in which four different solution-processed ZnO-based nanoparticles were used as electron transport layers: (i) pristine ZnO, (ii) 0.03 at %, (iii) 0.37 at %, and (iv) 0.8 at % aluminum-doped AZO nanoparticles. The degradation of solar cells under prolonged illumination (40 h under 1 sun), in which the ZnO/AZO layers were processed in air or inert atmosphere, is studied. We demonstrate that the presence of oxygen during the ZnO/AZO processing is crucial for the photostability of the resulting solar cell. While devices based on undoped ZnO were particularly affected by degradation, we found that using AZO nanoparticles the losses in performance, due to the presence of oxygen, were partially or totally prevented depending on the Al doping level.

Nyckelord: polymer solar cells, aluminum-doped ZnO, photostability, ZnO nanoparticles, degradation, oxygen



Denna post skapades 2016-02-24. Senast ändrad 2016-07-07.
CPL Pubid: 232400

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Polymerteknologi

Ämnesområden

Polymerkemi

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER) (EC/FP7/287594)